Error 400

[alex772]

what is error 400?

[jredmond]

It's "bad request": https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/400

Something about the webhook is invalid, as far as the receiving server is concerned. It could be syntax, or it could be missing some expected content, or it could be that the listener does not accept POSTs, or it could be something else. You'll need to check the receiving box to get more details.

[lingmaaki]

The 400 Bad Request error is an HTTP status code indicates that the request you sent to the webserver was malformed , in other words, the data stream sent by the client to the server didn't follow the rules. It means that the request itself has somehow incorrect or corrupted and the server couldn't understand it. The server is refusing to service the request because the entity of the request is in a format not supported by the requested resource for the requested method . Therefore, it prevents the website from being properly displayed. There are a number of different causes for a 400 Bad Request Error . It might be a malformed request syntax, invalid request message framing, or deceptive request routing . In most cases, the problem is on the website itself, and there's not much you can do about that. To fix a 400 Bad Request error it is best to start diagnosing the issue from the client side itself. Complete the steps outlined in this section to help diagnose and correct the error.

Check for errors in the URL.
Clear Browser Cache and cookies.
Clear DNS Cache.
Check your File upload Size.
Deactivate Browser Extensions.
Contact the site owner to report the 404 error.